Is there a newer version for BlenRig add on?
The author is currently working on a new version. Quote from blenderartists thread:
Juan Pablo Bouza, 17th March 2021:

The working version would be the one I posted a couple of days ago:
https://blenderartists.org/uploads/short-url/jfTvnK4no3dGC2VI7Udvep1fNcL.zip
My advice is that you wait until a publish the Beta of the new BlenRig
version, I’m really close to getting it ready. If I don’t finish it
this week it will be next week, but we are really close. So don’t
waste your time rigging a character with the version that is available
right now

The last official version on github is Blendrig 5 for Blender 2.8. There is a bug and this version does not run for Blender 2.83 and higher. Blender 2.82 is ok. (Blender 2.92 I don't know). The calc bone roll operation script does not work properly.
There is a question here at BSE, too: Issue with execution of &quot;Calc rolls&quot; function